NiSi Cine Lens Set Athena Prime Add-On (3 Lenses) E-Mount

NiSi Cine Lens Set Athena Prime Add-On (3 Lenses) E-Mount – Matched T-stops and 300° Focus Rotation for Cinematic Control

This NiSi Athena Prime Add-On kit includes three E‑mount cine primes designed for filmmakers who need consistent exposure and precise focus pulls. The set contains 18mm T2.2, 40mm T1.9 and 135mm T2.2 Athena Prime lenses, plus a hard case sized for nine Athena lenses. The lenses share matched mechanical and optical characteristics across the Athena series to simplify lens changes during production.

What this kit offers

• Three NiSi Athena Prime E‑mount lenses: 18mm T2.2, 40mm T1.9 and 135mm T2.2.
• NiSi hard case designed to hold up to nine Athena lenses, included in the kit.
• Mechanical consistency across the Athena range for quick swaps without rebalancing on gimbals.

Optical performance and aperture consistency

The Athena Prime series covers focal lengths from ultra-wide 14mm to portrait 135mm across the full lineup, allowing a wide variety of shooting scenarios. Within the series, several focal lengths share the same maximum T-stop ratings for uniform exposure:

• 25mm, 35mm, 40mm, 50mm and 85mm: maximum aperture T1.9.
• 18mm and 135mm: maximum aperture T2.2.
• 14mm: maximum aperture T2.4.

These T-stop ratings measure the actual light transmission through the lens and help maintain consistent exposure when switching between focal lengths in the Athena range.

Image circle and sensor compatibility

The Athena Primes provide a 46mm image circle. Therefore, they suit full-frame cameras and larger format sensors within the supported mount options.

Mount options and filter system

The Athena Prime series is available in multiple mount options: ARRI PL, Canon RF, Sony E, Panasonic/Leica L and Fuji G. The lenses include a proprietary rear filtration system with different implementations depending on mount:

• RF, L and G mount lenses: Drop‑In filter option.
• E‑mount lenses: available in two versions — with Drop‑In filter or without Drop‑In filter.
• PL‑mount lenses: utilize a rear filter.

Important notes:

• Sony FX9 cameras cannot use the E‑mount version with Drop‑In filters.
• To achieve infinity focus and clear images, you must use the Drop‑In clear filter on RF, L, G and E mounts (when the E‑mount lens has the Drop‑In option) and the rear filter on PL‑mount lenses.

NiSi also provides weather sealing for the Drop‑In filter to protect the filter mount in challenging conditions.

Mechanical design and ergonomics

The Athena primes are designed for consistent handling across the series. Most lenses share the same 77mm front filter thread, with the exception of the 14mm lens. Both aperture and focus rings are matched across the range to ensure a uniform feel when switching lenses.

• All Athena lenses (except 14mm) share a 77mm filter thread.
• Lenses have similar weight across the series, so you do not need to rebalance a gimbal when changing Athena lenses.
• Standard 0.8 MOD focus and iris gears make these lenses compatible with common follow focus and matte box systems.
• Focus rotation: 300° for precise pulling.
• Fluorescent focus scales are marked in both imperial and metric units for accurate repeatable focus marks.

Aberration control and image detail

The Athena Primes are designed to deliver low chromatic aberration and controlled micro‑contrast, which supports finer image detail across the frame. The lenses also minimize focus breathing, keeping field‑of‑view changes during focus adjustments extremely small from minimum focus distance to infinity.

Accessories and optional items

• NiSi 77mm close‑up lens (sold separately) can reduce minimum focus distance and enable macro effects.
• Included in this kit: NiSi hard case for nine Athena lenses to protect and store your lens collection.

Kit contents

• 1x NiSi Athena Prime 18mm T2.2 E‑Mount
• 1x NiSi Athena Prime 40mm T1.9 E‑Mount
• 1x NiSi Athena Prime 135mm T2.2 E‑Mount
• 1x NiSi Hardcase for 9pcs NiSi Athena Lenses

Technical specifications

FAQ

Question: Will these E‑mount lenses work with a Sony FX9 if I choose the Drop‑In version?
Answer: No. The Sony FX9 cannot use the E‑mount version that includes Drop‑In filters. Choose an E‑mount lens version without Drop‑In or confirm compatibility with your camera before purchasing.

Question: Do I need to rebalance my gimbal when swapping Athena lenses?
Answer: In most cases no. Athena lenses are similar in weight across the series, so you generally do not need to rebalance when switching between Athena primes, which speeds up lens changes during shoots.

Question: How do I ensure infinity focus when using rear or Drop‑In filters?
Answer: To achieve infinity focus and obtain clear images, you must use the Drop‑In clear filter on RF, L, G and E mounts (when using the E‑mount Drop‑In version) and the rear filter on PL‑mount lenses. Using the correct filter configuration is required for proper optical performance.

Question: Can I use standard follow focus systems and matte boxes with these lenses?
Answer: Yes. Athena primes feature standard 0.8 MOD focus and iris gears and matched aperture/focus rings, so they are compatible with a wide range of follow focus units and matte box systems.

Question: Is there a way to get closer focus or macro effects with these lenses?
Answer: Yes. NiSi offers a 77mm close‑up lens (sold separately) that reduces the minimum focus distance and enables macro‑style effects on Athena lenses that use a 77mm front thread.